JPH11204062A - Winding method of deflection yoke and horizontal deflection coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly correct an XH mis-convergence by providing a pair of auxiliary deflection coils connected to a horizontal deflection coil and wound with the coil from a window part that is an inner circumference of the coil to the outer circumference thereof. SOLUTION: A horizontal deflection coil 10 provided with a window part 15 is formed in a saddle shape, and a pair of the horizontal deflection coils 10 are opposed to each other via a butting part 16. In an intermediate area between the beginning and end of winding a pair of the top and bottom horizontal deflection coils 10, i.e., in an intermediate area between an end of the window part 15 side that is an inner circumference of the horizontal deflection coil 10 and an end on an outer circumference side, an auxiliary deflection coil 11 is disposed. When the horizontal deflection coil 10 is wound, it is generally wound from the window part 15 side. When the horizontal deflection coil 10 is wound to the outer circumference from the window part 15 side, the auxiliary deflection coil 11 is wound together with the horizontal deflection coil 10 in the intermediate area between the end of the window part 15 side and the end on the outer circumference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke mounted on an in-line type color picture tube.

[0002]

2. Description of the Related Art In an image display apparatus using a three electron gun in-line type color picture tube, three electron beams emitted from three electron guns are satisfactorily concentrated (convergence) on a screen surface (screen). One of the methods is a self-convergence type deflection yoke. The deflection yoke of the self-convergence method is generally composed of a pair of upper and lower saddle-type horizontal deflection coils and a pair of left and right saddle-type vertical deflection coils, so that good convergence characteristics can be obtained.

However, in practice, in a deflection yoke generally mass-produced, misconvergence occurs due to a variation in characteristics of the saddle type coil and the like. Therefore, in order to correct misconvergence, a magnetic piece is attached to an appropriate position of a coil to make adjustment, or a correction circuit is used.

FIGS. 5A and 5B show typical misconvergence caused by variations in the horizontal deflection magnetic field. FIG. 5A shows a pincushion misconvergence pattern of the X (horizontal) axis generated when the pincushion of the horizontal deflection magnetic field becomes too strong, and FIG. 5B shows a case where the pincushion of the horizontal deflection magnetic field becomes too weak. 3 shows a barrel misconvergence pattern of the X axis generated in FIG. In FIG. 5, the solid line is R (red) and the broken line is B
The (blue) vertical bright line is shown. These misconvergences are generally referred to as XH misconvergence.

As a conventional example for correcting this type of XH misconvergence, there is a deflection yoke described in Japanese Patent Application Laid-Open No. 2-15031. As shown in FIG. 6, the prior application publication discloses that the horizontal deflection coil 1 is composed of a main coil 1a and a sub coil 1b which is an end on the winding start side or the winding end side. Describes a configuration in which variable inductance coils 2 are connected in parallel. In this case, it is necessary to provide the horizontal deflection coil 1 with the intermediate tap 3.

According to this configuration, since the variable inductance coil 2 acts as a bypass circuit, it is possible to control the horizontal deflection current flowing through the sub-coil 1b where the variable inductance coil 2 is connected in parallel. The generated magnetic field can be adjusted. This makes it possible to correct the XH misconvergence shown in FIG.

FIG. 7 is a plan view of the deflection yoke viewed from the exit (large diameter) side of the electron beam. Horizontal deflection coil 1
Are mounted on the inner surface of the flared bobbin 4 in a pair. The horizontal deflection coil 1 has a window portion 5 and is formed in a saddle shape.
Are opposed to each other.

[0008]

By the way, the sub coil 1b shown in FIG. 6 is arranged in the area A on the side of the window 5 which is the inner periphery of the horizontal deflection coil 1 shown in FIG. When the current is reduced, the horizontal deflection magnetic field has a stronger pincushion, and the barrel misconvergence shown in FIG. 5B can be corrected. However, generally, when the current in one section of the window 5 side is controlled, the screen X
A difference occurs between the convergence change amount on the axis and the convergence change amount at the screen corner portion. As a result of correcting the XH misconvergence, a misconvergence as shown in FIG. 8 occurs.

On the other hand, when the sub-coil 1b shown in FIG. 6 is arranged in the area B on the outer peripheral side of the horizontal deflection coil 1 shown in FIG. 7 and the horizontal deflection current in the area B is controlled, as shown in FIG. Misconvergence occurs.

The present invention has been made in view of the above problems, and has as its object to provide a deflection yoke which can satisfactorily correct XH misconvergence and does not complicate assembly work. And

[0011]

According to the present invention, there is provided a deflection yoke having a pair of saddle-type horizontal deflection coils connected to the horizontal deflection coil. A pair of auxiliary deflection coils wound together with the horizontal deflection coil in a range from a window portion which is an inner peripheral portion of the horizontal deflection coil to an outer peripheral portion, or a pair of auxiliary deflection coils wound between the horizontal deflection coils. Providing a deflection yoke characterized by being provided with a deflection coil,
(2) In the method of winding a horizontal deflection coil mounted on a deflection yoke, when the horizontal deflection coil is circumferentially wound from one end to the other end, the one end is connected to the other end. An object of the present invention is to provide a method of winding a horizontal deflection coil, wherein an auxiliary deflection coil connected to the horizontal deflection coil is additionally wound in an intermediate region between the ends.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A deflection yoke according to the present invention will be described below with reference to the accompanying drawings. 1 is a plan view showing one embodiment of the deflection yoke of the present invention, FIG. 2 is a circuit diagram showing one embodiment of the deflection yoke of the present invention, and FIG. 3 is a side view showing the horizontal winding section 20 in FIG. 4 shows the horizontal winding part 20 shown in FIG.
It is a figure showing the winding method of.

In FIG. 1, a pair of upper and lower horizontal deflection coils 10 are mounted on the inner surface of the flared bobbin 14. The horizontal deflection coil 10 has a window portion 15 and is formed in a saddle shape, and a pair of horizontal deflection coils 10 are opposed to each other via an abutting portion 16.

An intermediate position between the start and end of winding of the pair of upper and lower horizontal deflection coils 10, that is, the horizontal deflection coil 1
The auxiliary deflection coil 11 is arranged in an intermediate region between the end on the window portion 15 side, which is the inner peripheral portion of O, and the end on the outer peripheral side. The horizontal deflection coil 10 and the auxiliary deflection coil 11 are referred to as a horizontal winding unit 20. This auxiliary deflection coil 1
1 is wound in a winding step of winding the horizontal deflection coil 10 as described later in detail. The number of turns of the auxiliary deflection coil 11 may be about 1 to 2 turns.

Here, an example of a circuit configuration of the deflection yoke of the present invention will be described with reference to FIG. As shown in FIG. 2, a pair of upper and lower horizontal deflection coils 10 are connected in parallel,
A pair of upper and lower auxiliary deflection coils 11 are also connected in parallel. The horizontal deflection coil 10 and the auxiliary deflection coil 11 are connected in series via a differential coil 13. Note that the differential coil 13 is not directly related to the present invention and can be omitted.

Further, a variable inductance coil 12 for adjusting convergence is connected in parallel to the auxiliary deflection coil 11. When the inductance of the variable inductance coil 12 is reduced, the current flowing through the auxiliary deflection coil 11 is reduced, and the horizontal deflection magnetic field has a stronger pincushion, so that barrel misconvergence shown in FIG. 5B can be corrected. Conversely, when the inductance of the variable inductance coil 12 is increased, the pincushion misconvergence shown in FIG. 5A can be corrected.

In the present invention, the auxiliary deflection coil 11
Is wound at an appropriate position in the middle portion of the horizontal deflection coil 10, so that the misconvergence as shown in FIG. 8 does not occur. Thus, in the present invention, XH misconvergence can be satisfactorily corrected. The connection between the horizontal deflection coil 10 and the auxiliary deflection coil 11 is not limited to that shown in FIG. 2, and the means for controlling the current flowing through the auxiliary deflection coil 11 is not limited to the variable inductance coil 12.

Here, the horizontal winding section 20 will be described in detail. When the horizontal deflection coil 10 is wound by a winding machine (not shown), it is usually wound from the window 15 side, which is the inner peripheral portion of the horizontal deflection coil 10. Therefore, when winding the horizontal deflection coil 10 from the window portion 15 side to the outer peripheral portion,
The auxiliary deflection coil 11 is wound together with the horizontal deflection coil 10 in an intermediate region between the end on the window 15 side and the end on the outer peripheral side. Then, as shown in FIG. 3, it is possible to obtain a horizontal winding part 20 in which the auxiliary deflection coil 11 is wound together with the horizontal deflection coil 10.

Further description will be made with reference to FIG. FIG.
As shown in FIG. 4A, when the horizontal deflection coil 10 is wound, for example, for two turns, as shown in FIG.
Are wound in a direction in which the horizontal deflection coil 10 is wound. When the auxiliary deflection coil 11 has one turn,
From the fourth turn on, only the horizontal deflection coil 10 is wound. When the auxiliary deflection coil 11 has a plurality of turns, the same operation may be repeated.

It should be noted that the operation of the winding machine may be temporarily stopped at the time of switching between the case where only the horizontal deflection coil 10 is wound and the case where the horizontal deflection coil 10 and the auxiliary deflection coil 11 are simultaneously wound. Good.

In this embodiment, the horizontal deflection coil 10 and the auxiliary deflection coil 11 are wound simultaneously. However, the winding of the horizontal deflection coil 10 is temporarily stopped, and only the auxiliary deflection coil 11 is wound alone. Thereafter, the horizontal deflection coil 10 may be wound. In any case, the auxiliary deflection coil 11 may be wound in the intermediate region of the horizontal winding unit 20 after the winding is completed.

That is, the auxiliary deflection coil 11 wound together with the horizontal deflection coil 10 is not limited to the horizontal deflection coil 10 and the auxiliary deflection coil 11 being wound at the same time. This includes all forms of winding the auxiliary deflection coil 11 in a part of the winding step of winding. The auxiliary deflection coil 11 is a horizontal deflection coil 1
0 may be wound near the surface on the bobbin 14 side or near the surface on the side opposite to the bobbin 14, or may be wound inside the horizontal deflection coil 10. The auxiliary deflection coil 11 is apparently embedded in the horizontal deflection coil 10 or sandwiched between the horizontal deflection coils 10, and is wound between the horizontal deflection coils 10.

As shown in FIG. 3, the horizontal winding section 20 starts the winding of the horizontal deflection coil 10 and ends the two windings 10a and the winding of the auxiliary deflection coil 11 starts and ends, as shown in FIG. The last two leader lines 11
A total of four coils are drawn out. Since the horizontal winding section 20 can be automatically wound by a winding machine, there is no need to provide an intermediate tap on the horizontal deflection coil 10 and only two extra coil leads are required. The assembly work of the deflection yoke does not become so complicated.

In the deflection yoke of the present invention described above, since the auxiliary deflection coil 11 is wound together with the horizontal deflection coil 10, the electric wires used for the auxiliary deflection coil 11 and the horizontal deflection coil 10 are the same. It is difficult to distinguish between the two. Therefore, it is desirable that the auxiliary deflection coil 11 and the horizontal deflection coil 10 can be easily identified.

Therefore, the color and wire diameter of the electric wire used for the auxiliary deflection coil 11 are made different from those of the electric wire used for the horizontal deflection coil 10. When the electric wire used for the auxiliary deflection coil 11 and the horizontal deflection coil 10 is a stranded wire, the twist pitches are made different from each other. Differences in color, wire diameter, and twist pitch of the wires may be combined. As described above, if at least one of the color, wire diameter, and twist pitch of the electric wire used for the auxiliary deflection coil 11 is made different from that of the electric wire used for the horizontal deflection coil 10, the auxiliary deflection coil 11, the horizontal deflection coil 10, In the winding work of the horizontal winding part 20 and the assembling work of the deflection yoke, it is possible to improve the workability without mistakenly connecting the electric wires of the two. In particular, it is extremely effective to make the colors of the electric wires different from each other.

The present invention is not only a so-called saddle-saddle type deflection yoke comprising a saddle type horizontal deflection coil and a saddle type vertical deflection coil, but also a so-called saddle comprising a saddle type horizontal deflection coil and a toroidal type vertical deflection coil. -It can also be used for a toroidal deflection yoke. The present invention can be variously modified without departing from the gist of the present invention.

[0027]

As described above in detail, the deflection yoke of the present invention is connected to a horizontal deflection coil, and is wound together with the horizontal deflection coil in a range from the window, which is the inner periphery of the horizontal deflection coil, to the outer periphery. A pair of lined auxiliary deflection coils, and control means for controlling a horizontal deflection current flowing through the auxiliary deflection coils are provided, and the method of winding a horizontal deflection coil according to the present invention comprises: When winding in a circumferential form from one end to the other end, an auxiliary deflection coil connected to a horizontal deflection coil is also wound around an intermediate region between one end and the other end. Therefore, XH misconvergence can be satisfactorily corrected, and the work of assembling the deflection yoke is not complicated.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a circuit diagram showing one embodiment of the present invention.

FIG. 3 is a side view showing a horizontal winding unit 20 in FIG.

4 is a diagram showing a winding method of the horizontal winding unit 20 shown in FIG.

FIG. 5 is a diagram showing an XH misconvergence pattern.

FIG. 6 is a circuit diagram showing a conventional example.

FIG. 7 is a plan view showing a conventional example.

FIG. 8 is a diagram showing a misconvergence pattern which is a problem of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Horizontal deflection coil 10a Leader 11 Auxiliary deflection coil 11a Leader 12 Variable inductance coil (control means) 13 Differential coil 14 Bobbin 15 Window 16 Butting part 20 Horizontal winding part

Claims (9)

[Claims] 1. A deflection yoke having a pair of saddle-type horizontal deflection coils, wherein said horizontal deflection coil is connected to said horizontal deflection coil and extends from a window, which is an inner peripheral portion of said horizontal deflection coil, to an outer peripheral portion. And a pair of auxiliary deflection coils wound therewith. 2. A deflection yoke provided with a pair of saddle-type horizontal deflection coils, wherein the horizontal deflection coil is connected to the horizontal deflection coil and extends from a window, which is an inner peripheral portion of the horizontal deflection coil, to an outer peripheral portion. A deflection yoke characterized by comprising a pair of auxiliary deflection coils wound therebetween. 3. The deflection yoke according to claim 1, further comprising control means for controlling a horizontal deflection current flowing through the auxiliary deflection coil. 4. The deflection yoke according to claim 3, wherein said control means is a variable inductance coil connected in parallel to said auxiliary deflection coil. 5. A wire according to claim 1, wherein at least one of a color, a wire diameter and a twist pitch of an electric wire used for said auxiliary deflection coil is different from that of an electric wire used for said horizontal deflection coil. A deflection yoke according to any one of the above. 6. A method for winding a horizontal deflection coil mounted on a deflection yoke, wherein when the horizontal deflection coil is wound circumferentially from one end to the other end, the horizontal deflection coil is wound from one end to the other end. A method of winding a horizontal deflection coil, further comprising winding an auxiliary deflection coil connected to the horizontal deflection coil in an intermediate region between the other ends. 7. The winding method for a horizontal deflection coil according to claim 6, wherein the auxiliary deflection coil is wound simultaneously with the horizontal deflection coil. 8. The method for winding a horizontal deflection coil according to claim 6, wherein the auxiliary deflection coil is wound independently of the horizontal deflection coil. 9. A wire according to claim 6, wherein at least one of a color, a wire diameter and a twist pitch of an electric wire used for said auxiliary deflection coil is different from that of an electric wire used for said horizontal deflection coil. The winding method of a horizontal deflection coil according to any one of the above.